Optimer Pharmaceuticals, Inc. Reports Inducement Grants Under NASDAQ Listing Rule 5635(c)(4)

SAN DIEGO, April 1, 2011 /PRNewswire/ -- Optimer Pharmaceuticals, Inc. (NASDAQ: OPTR) announced today that on March 31, 2011 the Compensation Committee of its Board of Directors approved the grant of inducement stock options to purchase an aggregate of 258,000 shares of common stock to 7 new employees.

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Each stock option has an exercise price per share equal to $11.83, the fair market value on the grant date, and vests over four years, with 25% of the shares vesting on the one-year anniversary of the applicable vesting commencement date and 1/48 of the shares vesting monthly thereafter, subject to the new employee’s continued service relationship with the Company. Each stock option also has a ten year term and is subject to the terms and conditions of the Company’s 2006 Equity Incentive Plan and the stock option agreement pursuant to which the option was granted.

The stock options were granted as inducements material to the new employees entering into employment with Optimer in accordance with NASDAQ Listing Rule 5635(c)(4).

About Optimer

Optimer Pharmaceuticals, Inc. is a biopharmaceutical company focused on discovering, developing and commercializing innovative hospital specialty products that have a positive impact on society. Optimer has two anti-infective product candidates in development, fidaxomicin and Pruvel (prulifloxacin). Fidaxomicin is a narrow spectrum antibiotic being developed for the treatment of Clostridium difficile infection (CDI). The FDA granted the Company’s request for six-month Priority Review of fidaxomicin, and has assigned a Prescription Drug User Fee Act (PDUFA) goal date of May 30, 2011. The Company also filed a Marketing Authorization Application (MAA) with the European Medicines Agency (EMA) for fidaxomicin. Pruvel is a prodrug in the fluoroquinolone class of antibiotics being developed as a treatment for infectious diarrhea. Additional information can be found at http://www.optimerpharma.com.

Contacts

Optimer Pharmaceuticals, Inc.
Christina Donaghy, Corporate Communications Manager
John D. Prunty, Chief Financial Officer & VP Finance
858-909-0736

Canale Communications, Inc.
Jason I. Spark, Senior Vice President
619-849-6005

SOURCE Optimer Pharmaceuticals, Inc.

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